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Blancett B2800 Flow Meter Electronic Signal Monitor and Micro-Controller Sourcing
Quick Answer: Silver Instruments supplies signal conditioning, pulse input totalizers, and paperless recorders for Blancett B2800 turbine flow meters. Send your flow range in L/min, pipe size in DN, fluid name, and pulse K-factor. We respond within one business day to most Southeast Asia, Oceania, Latin America, Africa, and Middle East inquiries.
The Blancett B2800 turbine meter outputs a raw magnetic pickup pulse. That pulse train is not a standard analog signal. Many control systems need a 4-20 mA signal or a buffered pulse for a micro-controller.
In practice, most engineers skip this part and wire the raw pulse directly into a PLC digital input. We have seen this on customer sites many times. The result is missed counts, especially when the cable runs exceed 10 meters or when variable frequency drives sit nearby.
Why the B2800 Pulse Output Needs Signal Conditioning
The B2800 magnetic pickup generates a low amplitude sine wave at low flow rates. The frequency range depends on the K-factor and the actual flow through the meter. A small line size meter can output hundreds of pulses per second at full flow. A micro-controller input can miss these edges if the signal is not squared and pulled up to a clean 5 V or 24 V level.
Silver Instruments recommends a signal conditioner with an adjustable trigger level. This matters for custody transfer skids on marine fuel loading lines. A shipyard in Singapore asked us for a conversion kit after a direct PLC input showed a 3 percent totalizer error against a manual stick reading.
Matching a Micro-Controller to the B2800 Turbine Meter
Use a micro-controller with an interrupt-capable input and a hardware timer. The pulse frequency from a B2800 can exceed 2 kHz on smaller line sizes. Software polling in a loop is not reliable for totalizing. Because one missed interrupt is one missed liter.
Specify the K-factor printed on the B2800 meter body. A typical unit used for diesel fuel may have a K-factor near 1.29 pulses per mL. A water unit may be different. Silver Instruments can pre-scale the signal to match your existing flow computer or RTU input.
Recommended Silver Instruments Devices for B2800 Signal Monitoring
For local display and totalizing, choose a pulse input flow totalizer with a 24 V DC sensor supply. Silver Instruments offers a loop-powered totalizer with pulse divider and 4-20 mA retransmission. The output can go to a paperless recorder with 8 analog inputs and 4 pulse inputs. This configuration works for chemical batch dosing systems in Vietnam and for water treatment plants in Australia.
For hazardous areas, request an ATEX Zone 1 approved signal isolator. Silver Instruments can add a PT100 temperature input to compensate for fluid density changes on fuel oil measurement. This is helpful when the fluid viscosity is above 5 cP and the flow range sp
Field Issues We See on B2800 Meters
A paint manufacturer in Southeast Asia had a B2800 on solvent transfer. The signal dropped to zero every time a nearby mixer started. The problem was not the meter. The pulse cable was not shielded and the micro-controller input had no low pass filter. We supplied a signal isolator with 10 kHz bandwidth and an armored shielded cable. The totalizer returned to within 0.5 percent of the manual batch weight.
Another customer in Chile used a B2800 for truck loading. The pulse output fed a 3.3 V micro-controller directly. The signal amplitude at low flow was too low to trigger the input. A pre-amplifier with 30 mV sensitivity solved the issue.
How to Request a Quote for a B2800 Signal Monitor
Send us the fluid name, flow range in L/min or m3/h, pressure in bar, temperature in °C, pipe size in DN, and the B2800 K-factor. Also state the output you need. Options include 4-20 mA HART, RS485 Modbus, buffered pulse, or relay pulse for a remote totalizer.
Contact Silver Automation Instruments for a quote. Tel: +86-135-1213-1526. WhatsApp: 86-135-12131526. WeChat: +86 13512131526. Most requests from Vietnam, Indonesia, Mexico, Nigeria, and Saudi Arabia receive a same-day reply.
Silver Instruments is a flow meter manufacturer and process instrument supplier. Our product range includes Coriolis mass flow meters, electromagnetic flow meters, ultrasonic flow meters, vortex flow meters, oval gear flow meters, thermal mass flow meters, pressure transmitters, and paperless recorders. For B2800 replacements or signal conversion kits, send your process data for a same-day technical reply.
Frequently Asked Questions on B2800 Signal Monitoring
What signal does the Blancett B2800 flow meter output?
The B2800 outputs a magnetic pickup pulse. The frequency is proportional to flow rate. The pulse amplitude changes with flow speed and cable load.
Can I connect the B2800 directly to a PLC or micro-controller?
You can, but you may get false counts below 5 Hz and above 1 kHz without signal conditioning. A signal conditioner with adjustable trigger level and pull up resistor solves most field problems.
Which Silver Instruments products work with the B2800 pulse output?
A pulse input flow totalizer, a 4-20 mA loop isolator, or a paperless recorder with math channels. Silver Instruments can pre-wire and test the kit before shipment.
What parameters do you need for a quote?
Fluid name, flow range, pressure in bar, temperature in °C, pipe size in DN, K-factor, and required output signal. A photo of the meter nameplate also helps.
Do you ship B2800 signal monitors to Southeast Asia, Oceania, Latin America, Africa, and the Middle East?
Yes. Silver Instruments exports to Indonesia, Vietnam, Australia, Mexico, Chile, Nigeria, Saudi Arabia, and other countries. We provide documentation and commercial invoice support for customs.
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